Lubricant compressor



Feb. 26, 1929.

O. U. ZERK LUBRICANT COMPRESSOR Filed April 19, 1924 www @gaf a. Zw?.

Patented F eb. 26, 1929.

-UNITED STATES vPATENT OFFICE.

OSCAR U. ZERK, OF CLEVELAND, OHIO, ASSIGNOR TO ALEMITE MANUFACTURING CORPORATION, CHICAGO, ILLINOIS, A CORPORATION OF DELAWARE.

LUBRICAN COMPRESSOR.

' Application med April i9,

My invention relates to improvements in lubricant compressors, and is particularly concerned with improvements in that type of lubricant compressor which forms a part of a system embodying a plurality of littin s adapted to be secured to the bearings to e lubricated, and a compressor for supplying lubricant under pressure to the fittings. K

My present invention relates to that type of compressor in which the pressure upon the lubricantl is generated, or created, by a force exerted upon the compressor in a direction toward the fitting to which the compressor is supplying lubricant.

' The object of my present invention isto- `pression 24.

provide a compressor, such as described,v which is simple in construction, economical to manufacture `and by means of which the 2,0 operator can easily exert comparatively high pressures upon the lubricant being forced into-the fittings. n

Other objects of my invention will appear as this descri tion progresses, reference be# ing had to t e accompanying drawings' in which Figure 1 isa side elevation of myv 1mproved compressor, and Figure-2 1s a central longituidnal section. l A n Referring tothe drawings my improved compressor comprises a barrel 5 having a closure 6' permanentl secured to one end thereof, and provided7 with'a relief port 7 which is closed by a\valve 8, p'fefera ly of leather. This valve is gheld.` in place by' means of leaf spring 9 secured to the cap by a rivet 10, or any other desiredrmeans.

The opposite end of the barrel terminates in a conical shaped cap 11 to which-is secured the guide tube 12, this tube and the cap 11 being united by a screw threaded connection 13. y j Asleeve 14 is threaded into the inner end of the uide tube 12. This sleeve has an 'enlarged bore 15 at its outer end, forming an annular seat 16, which is preferably covered by means of a gasket 17 of'leather, fiber, or any other suitable material. Ports 18 formed in the wall of the sleeve 14, outwardly beyond the seat 16, provide means for establishin l'communication between the barrel 5 and t e interior of the guide tube 12. The barrel 5, guide tube 12 and sleeve -tween the outer end of 1924. Serial No. 707,698.

14 together .constitute a rigid body guiding and supporting the movable parts hereinafter described.

A cylinder 19 is reciprocably mounted in the outer end of the guide tube 12 and is f vided with a sphericaly surface 26 for contacting with the conical surface of the de- A closure 27 is yieldingly held against the outer end ofthe cylinder 19 by means of the compression spring 28 which is confined bethe cap 22 and the closure 27.l

A hollow, or tubular, plunger 29 is mounted in the guide tube 12 and reciprocable in the cylinder 19. The inner end 29 of the plunger 29 is enlarged in diameter as shown in the drawing and is closed by a. cap 30 having a central port' 31 and an outwardly ingly held in contact with the inner side of the end of. the cap 30 b means of the compression spring 34, whichI is confined between the closure 33, and the shoulder 35, formed in the hollow plunger 29. 'A compression spring `36 confined between the inner end of the cylinder 29 and the annular pluri er 32 provides means, for yieldingly ho ding the c linder 19 in its outermost position, vand t e plunger in its innermost position, with the end of the cap 30 in contact with the asket 17. In other words the spring 36 yiel ingly holds the cylinder 19 andvthe plunger 29 in separated relation to each other.Y

It should be noted that .the plunger 29 is not rigidly connected with any other portion of the compressor but is free to move with respect to all other portions of the compressor. In other words the plunger 29 merely floats in the cylinder 12.

Inusing my improved compressor the op- '80 extending flange 32. A closure 33 is yieldg l a very light spring, and into the plunger.

the closure 11 and removes the guide tube,

and the parts supported thereby, from the compressor, and then substantially fills the barrel through the opening in the closure 11. The guide tube 12, with its associated parts, is then secured to the compressor, and the cap or nozzle 22 brought in contact with the end of a fitting 25, in the manner shown in Figure 2. The operator thereupon pushes against the cap 6 of the compressor 1n the d1rection of the fitting 25. This causes the plunger 29 to enter the cylinder 19, thereby displacing a portion of the contents ofthe cylinder 19 past the valve 27, and out through the cap or nozzle 22 and into the fitting. The operator then releases the pressure upon the cap 6 whereupon the spring 36, expanding, causes the parts to reassume the'position shown in Figure 2. When the plunger'29 begins to move out of the cylinder 19 the valve 27 closes, under the tension of the spring 28, and thereby prevents the access of air to the interior of the cylinder. As the plunger 29 continues to be drawn from the cylinder 19 a vacuum is formed in the cylinder and when this reaches sufiicient intensity atmospheric pressure exerted upon the lubricant in the barrel 5 Iwill, cause the lubricant to be forced past the valve 33, against the tension of the spring 34, which 29 and cylinder 19. The operator thereupon again forces the barrel 5 toward the fitting `25, and thus repeats the process just described until sufiicient lubricant has been forced into the fitting.

My ob'ect in enlarging the inner end 29r ofthe p un er 29 is to make it possible tok confine, in t e plunger, a closure 33 having as largeas possible an area exposed to the pressure of the lubricant in the barrel 5, so that there willl always be sufficient pressure exerted upon 'the outer surface of the closure 33 to open it against the tension of the spring 34. y

When the barrel 5 is moved toward a fitting 25, the inner end of the cylinder 19 is moved into the sleeve 12 and displaces a part of the contents ofthis cylinder. The lubricant thus displaced is forced through the ports 18 into the barrel 5. A certain amount of leakage of air from the exterior to the interior of the uide tube 12 will take place between the guide tube 12 and the cylinder 19 and I have provided a sleeveI 14 to prevent this air, when it is displaced from the guide tubev I12, from being immediately drawn back into the plunger 29 and the cylinder 19. This is accomplished by the construction shown inasmuch as'this air is discharged at a point remote from the en-v trance to the sleeve 14, and there is little likelihood that it will be drawn intothis sleeve, and from thence, into the cylinden 19 and plunger 29.

tions and modifications within the scope of the appended claims.

Having thus described my invention what I claim is:` f

1. A- lubricant compressor comprising a barrel closed at one end and terminating at its other end in a removable guide tube, a cylinder slidably mounted in the outer end of said tube, the outer end of said cylinder being provided with mea'ns for making sealed contact with a lubricant fitting, a check valve closing thevouter end of Isaid cylinder, a sleeve threaded into the inner end of said guide tube and 'provided with a port for establishing communication between said barrel and said guide tube, and comprising an outwardly facing annular seat, a hollow plunger reclprocable in said cylinder,l the inner end of saidl plunger being enlarged and provided with a valve seat, a valve coacting with said seat, a vspring yieldingly tube, the outer end of said cylinder being provided with means for making sealed contact with a lubricant fitting, a check valve closing the outex` end of said cylinder, a sleeve secured to theinner end of said guide tube and comprising an outwardl annular seat, a hollow plunger reciprocable in said cylinder, the inner end of said plunger being enlarged and provided with a valve seat, a valve coacting with s'aid seat, a spring yieldingly holding said valve in closed position, and another spring for yieldingly holding said cylinder and said plungerin separated relation, and for holding the inner endvof said plunger against said annular seat.

3. A lubricant compressor comprising a barrel terminating in a guide tube, -a cylinder slidably mounted in the outer end of said tube, the outer end of said cylinder be ing provided with means for making sealed contact with a lubricant fitting, a sleeve secured to the inner end of aid guide tube and comprising an outwarly facing annular seat, a hollow plunger reciprocable in said cylinder, the inner end of said plung- -er being provided with a valve seat, a valve `holding said valve in closed position and an l facing holding said valve in closed osition, and another spring'for yieldingly olding said'cylinder and said ylunger in separated relation, and for ho ding the inner end of said plunger against said annular seat.

l 4. A lubricant compressor comprising a barrel terminating in a guide tube, a cylinder slidably mounted in the outer end of said tube, a sleeve secured to the inner end of said guide tube, a hollow plunger recipro- -cable in said cylinder, the inner end of said plunger being provided with a valve seat, a valve coacti'ng with said seat, a spring yieldingly holding said valve in closed position, and another spring for yieldingly holding said cylinder and said plunger in separated relation.

5. A lubricant compressor comprising a barrel terminating in a guide tube, a cylinder slidably mounted in the outer end of said guide tube and movable in and out of said tube, a hollow plunger floating in the inner end of said tube and telescoping with said cylinder, a stop carried by said tube for limiting inward movement of said plunger, a valve for closing the inner end of said plunger, and a spring for yieldingly holding saidgcylinder and plunger in separated relation.

6. A lubricant compressor comprising a barrel terminating in a guide tube, a cylin` der slidably mounted in the outer end of said guide tube and movable in and-out of said tube, a hollow plunger lloating in the inner end of said tube and telescoping with said cylinder, a valve for closing the inner end of said plunger,`a stop for said plunger, and a spring for yieldingly holding said cylinder and plunger in separated relation and urging said plunger against said stop.

7. A lubricant compressor comprising a barrel, a guide tube secured to said barrel,

a hollow plunger carried by said guide tube and communicating with said barrel, a check valve through which lubricant enters' said plunger, a cylinder carried by said guide tube andreciprocable over said plunger, and a spring for holding said cylinder in its outermost position.

S. A lubricant compressor comprising a barrel, a cylinder communicating with said barrel and reciprocably vmounted thereon, a plunger coacting with said cylinder for discharging lubricant from said cylinder, said compressor comprising other means for discharging air, entering said compressor along said cylinder, at a point' remote from the point of communication between said cylinder and said barrel.

9. VA lubricant compressor comprising a body', ej eating-means at one end of said body having an axial inlet, said end and ejecting means having an annular sliding joint for supporting the latter and forming a chamv ber receiving the leakage from saaid'joint, and means for ejecting the contents of s'aid chamber laterally remote from said inlet.

l0. A lubricant compressor comprising a barrel having an end wall, said wall having an opening therethrough, a compression cylinder reciprocably mounted in vsaid opening, an inlet passage for saidcylinder, said inlet passage communicating with said barrel at a point adjacent said end Wall, an outlet passage for said cylinder, means closing said outlet passage to the entry of air therethrough, and means for preventing the air leaking along said cylinder from entering said inlet passage. v

In testimony lwhereof I have hereunto signed'by name this 1st da of April, 1924-.

OSCYR U. ZERK. 

